Replace your existing front sight with this versatile gas block. The Picatinny-style rails are perfect for mounting flip-up front sights or other accessories to your AR. Simple installation with four included head cap screws.
- Mounted by the use of four socket head cap screws using a 7/64" Allen wrench
- This gas block has a bore diameter of .750"
- Made from high quality steel
- Mil. Spec. phosphate coating